layui表单select框同时支持下拉和输入的解决方案

<div class="layui-input-inline"><select name="member_depart" lay-verify="required" id="member_depart" lay-filter="member_depart" style="height:10px;" lay-search><option value="">选择单位</option></select></div>

    //获取单位;
    $.get('./api/api.php?act=getMemberDepart&token=3cab7ce4142608c0f40c785b5ab5ca24', {}, function (res) {
      var memberHtml = ''
      for (var i = 0; i < res.data.length; i++) {
        memberHtml += '<option value="' + res.data[i].member_id +  ',' + res.data[i].member_depart + '" >' + res.data[i].member_depart + '</option>'
      }
      $('#member_depart').append(memberHtml);
      form.render();
      //监听下拉框
      form.on('select(member_depart)', function (data) {
        var txt = $("#member_depart option:selected").text();//获取select选中的值
        $('.member_depart').html(txt);
      });
    }, 'json');

  //监听下拉框
      form.on('select(member_depart)', function (data) {
        var txt = $("#member_depart option:selected").text();//获取select选中的值
        $('.member_depart').html(txt);
        //获取关联部门;
        var member_id = $("#member_depart").val().split(",")[0];
        getBranch(member_id);
      });